Polyester industrial yarn dedicated to marine hawser and preparation method thereof

Abstract

Embodiments of a polyester industrial yarn dedicated to a marine hawser and a preparation method thereof, relating to the technical field of industrial yarns, are disclosed. In some examples, the preparation method includes: S1, preparing a regenerated polyester chip; S2, high-viscosity anti-ultraviolet modified polyester chip; S3, antibacterial master batch; S4, mixing the high-viscosity anti-ultraviolet modified polyester chip and the antibacterial master batch, subjecting a resulting mixture to extruding and melting to form a spinning melt, and metering, spinning, and cooling to form a tow; S5, spraying a waterproof and acid- and alkali-resistant layer onto a surface of the tow; S6, subjecting the tow to first oiling; and S7, subjecting the tow to heat-setting of two-stage drawing and one-stage relaxation, network processing, second oiling, and winding forming, to obtain the polyester industrial yarn dedicated to the marine hawser.

1 .- 20 . (canceled) 
     
     
         21 . A method for preparing a polyester industrial yarn dedicated to a marine hawser, comprising:
 S1, preparing a regenerated polyester chip;   S2, blending the regenerated polyester chip in S1 with an anti-ultraviolet agent, polymerizing a resulting mixture of the regenerated polyester chip in S1 and the anti-ultraviolet agent, and granulating and tackifying the polymerized resulting mixture to obtain a high-viscosity anti-ultraviolet modified polyester chip;   S3, mixing the regenerated polyester chip in S1 with an antibacterial agent and melt granulating a resulting mixture of the regenerated polyester chip in S1 and the antibacterial agent to obtain an antibacterial master batch;   S4, mixing the high-viscosity anti-ultraviolet modified polyester chip obtained in S2 and the antibacterial master batch obtained in S3, extruding and melting the resulting mixture to form a spinning melt, and metering and spinning to form a tow;   S5, spraying a waterproof, acid-resistant, and alkali-resistant layer onto a surface of the tow obtained in S4;   S6, subjecting the tow in S5 to first oiling; and   S7, subjecting the tow in S6 to heat-setting of two-stage drawing and one-stage relaxation, network processing, second oiling, and winding forming to obtain the polyester industrial yarn dedicated to the marine hawser.   
     
     
         22 . The method of  claim 21 , wherein in S5, raw materials for the waterproof, acid-resistant, and alkali-resistant layer comprise, in parts by weight:
 30-45 parts of a waterborne polyurethane,   15-25 parts of a dispersant,   4-6 parts of silicon carbide,   10-20 parts of chitosan,   15-30 parts of sodium selenite,   5-6 parts of carbon nanotubes,   6-8 parts of titanium dioxide nanofibers,   20-35 parts of glycidyl ester epoxy resin,   3-10 parts of polytetramethylene ether glycol,   2-4 parts of butyl acrylate,   3-6 parts of polymaleic acid vinyl acid,   4-7 parts of dithiol succinate,   3-5 parts of polyurethane,   2-5 parts of dioctyl phthalate,   25-35 parts of deionized water,   10-15 parts of anhydrous ethanol, and   2-3 parts of acetic acid.   
     
     
         23 . The method of  claim 22 , wherein the waterproof, acid-resistant, and alkali-resistant layer is prepared by:
 mixing silicon carbide and a part of the dispersant, and ball milling a resulting mixture in a ball mill for 15-25 min, performing microwave heat treatment for 6-12 s, and taking out; adding a resulting product into a part of the waterborne polyurethane, ultrasonically dispersing for 8-18 min, cooling at a temperature of 0-3° C. for 2-4 h, leaving to stand at a temperature of 85-95° C. for 3-5 h, filtering, drying a resulting solid at a temperature of 40-50° C., and ball milling to a particle size of 15-50 nm, to obtain a modified silicon carbide;   dissolving sodium selenite in a part of deionized water to obtain a sodium selenite solution with a concentration of 15-35 mg/L, adding chitosan into the sodium selenite solution, mixing, heating a resulting mixture to a temperature of 50-60° C., stirring, subjecting a resulting mixture to rotatory evaporation under vacuum at a temperature of 55-60° C., performing ultraviolet intermittent irradiation, then performing heat preservation for 30-45 min, and freeze-drying, to obtain a modified chitosan;   mixing the carbon nanotubes and the modified chitosan, adding a remaining deionized water, ultrasonically dispersing for 10-15 min, adding titanium dioxide nanofibers, the modified silicon carbide and acetic acid thereto, mixing, adding glycidyl ester epoxy resin and anhydrous ethanol thereto, heating a resulting mixture to a temperature of 40-60° C., keeping at 40-60° C. while stirring for 30-45 min, and defoaming to obtain a mixed stock solution; and   mixing polytetramethylene ether glycol, butyl acrylate, polymaleic acid vinyl acid, dithiol succinate, polyurethane and dioctyl phthalate, heating a resulting mixture to a temperature of 110-130° C., keeping at 110-130° C. for 10-30 min, then adding a remaining waterborne polyurethane and a remaining dispersant thereto, mixing, further heating to a temperature of 150-180° C., keeping at 150-180° C. for 30-50 min, cooling to room temperature; and adding the mixed stock solution thereto, mixing, heating to a temperature of 80-90° C., keeping at 80-90° C. for 1-3 h, stirring at a rotating speed of 1500-2500 r/min for 20-40 min, cooling to room temperature, and spraying onto the surface of the tow.   
     
     
         24 . The method of  claim 23 , wherein the dispersant is sodium alginate. 
     
     
         25 . The method of  claim 22 , wherein the dispersant is sodium alginate. 
     
     
         26 . The method of  claim 21 , wherein in S2, a mass ratio of the anti-ultraviolet agent to the regenerated polyester chip is in a range of (1-5):(95-99). 
     
     
         27 . The method of  claim 26 , wherein raw materials for the anti-ultraviolet agent comprise, in parts by weight:
 10-20 parts of polypropylene resin,   5-7 parts of carbon nanotubes,   2-6 parts of nano titanium dioxide,   4-8 parts of nano zinc oxide,   5-7 parts of polyphenylene sulfide,   2-6 parts of butyl acrylate,   2-3 parts of zinc sulfate,   0.5-3 parts of attapulgite clay,   1-2 parts of diatomite,   1-3 parts of sodium α-olefin sulfonate,   1-2 parts of dibutyltin laurate,   1-2 parts of ammonium triphosphate,   1-2 parts of acrylamide,   1-4 parts of silane coupling agent KH-550,   20-35 parts of water,   1-3 parts of glycerol diacetate, and   2-5 parts of N,N-methylenebis(acrylamide).   
     
     
         28 . The method of  claim 21 , wherein raw materials for the anti-ultraviolet agent comprise, in parts by weight:
 10-20 parts of polypropylene resin,   5-7 parts of carbon nanotubes,   2-6 parts of nano titanium dioxide,   4-8 parts of nano zinc oxide,   5-7 parts of polyphenylene sulfide,   2-6 parts of butyl acrylate,   2-3 parts of zinc sulfate,   0.5-3 parts of attapulgite clay,   1-2 parts of diatomite,   1-3 parts of sodium α-olefin sulfonate,   1-2 parts of dibutyltin laurate,   1-2 parts of ammonium triphosphate,   1-2 parts of acrylamide,   1-4 parts of silane coupling agent KH-550,   20-35 parts of water, 1-3 parts of glycerol diacetate, and   2-5 parts of N,N-methylenebis(acrylamide).   
     
     
         29 . The method of  claim 28 , wherein the anti-ultraviolet agent is prepared by:
 mixing polypropylene resin, polyphenylene sulfide, butyl acrylate, and nano zinc oxide, stirring at a temperature of 85-100° C. for 18-25 h, and cooling to room temperature, to obtain a first material;   mixing carbon nanotubes, nano titanium dioxide, zinc sulfate, attapulgite clay, diatomite, sodium α-olefin sulfonate, dibutyltin laurate, ammonium tripolyphosphate, acrylamide, and water, heating a resulting mixture to a temperature of 85-115° C., keeping at 85-115° C. for 2-6 hours, adding N,N-methylenebis(acrylamide) and glycerol diacetate thereto, mixing, then cooling to a temperature of 35-60° C., filtering, washing, drying at a temperature of 90-120° C. for 2-7 hours, and cooling to room temperature, to obtain a second material; and   mixing the first material, the second material, and the silane coupling agent KH-550, heating a resulting mixture to a temperature of 85-95° C., keeping at 85-95° C. for 15-25 min, stirring at a rotational speed of 600-900 r/min for 10-20 min, and then cooling to room temperature, to obtain the anti-ultraviolet agent.   
     
     
         30 . The method of  claim 21 , wherein in S3, a mass ratio of the regenerated polyester chip to the antibacterial agent is in a range of (59.5-69.5):(30.5-40.5). 
     
     
         31 . The method of  claim 21 , wherein raw materials for the antibacterial agent comprise, in parts by weight:
 15-25 parts of nano zinc oxide,   7-15 parts of diatomite,   3-6 parts of cobalt nitrate hexahydrate,   2-6 parts of ammonium bicarbonate,   2-4 parts of glacial acetic acid,   20-50 parts of anhydrous ethanol,   2-6 parts of silver nitrate,   2-4 parts of sodium hydroxide, and   15-30 parts of deionized water.   
     
     
         32 . The method of  claim 21 , wherein raw materials for the antibacterial agent comprise, in parts by weight:
 15-25 parts of nano zinc oxide,   7-15 parts of diatomite,   3-6 parts of cobalt nitrate hexahydrate,   2-6 parts of ammonium bicarbonate,   2-4 parts of glacial acetic acid,   20-50 parts of anhydrous ethanol,   2-4 parts of sodium hydroxide, and   15-30 parts of deionized water.   
     
     
         33 . The method of  claim 32 , wherein the antibacterial agent is prepared by:
 mixing nano zinc oxide and ammonium bicarbonate, adjusting a pH value of a resulting system to neutral, stirring at a rotating speed of 550-750 r/min for 25-45 min, heating to a temperature of 30-40° C., keeping at 30-40° C. for 10-30 min, cooling to room temperature to obtain a mixture, mixing the mixture and cobalt nitrate hexahydrate, dispersing in a part of anhydrous ethanol, adding diatomite and glacial acetic acid thereto, mixing, and subjecting a resulting mixture to reaction in a water bath at a temperature of 80-95° C. for 1-3 hours, to obtain a mixed solution; and   dissolving sodium hydroxide in a remaining anhydrous ethanol, magnetically stirring for 15-30 min, mixing a resulting alkali solution with the mixed solution, stirring for 25-35 min, subjecting a resulting mixture to reaction in a water bath at a temperature of 80-100° C. for 4-6 h, then adding deionized water thereto until a solution becomes into a milky white system, cooling to room temperature, magnetically stirring for 10-35 min, leaving a resulting system to stand, washing, and centrifuging, to obtain the antibacterial agent.   
     
     
         34 . The method of  claim 21 , wherein in S7, during the heat-setting of two-stage drawing and one-stage relaxation:
 a first-stage drawing is performed at a temperature of 128-132° C. to a draw ratio of 4.1-4.3;   a second-stage drawing is performed at a temperature of 185-195° C. to a draw ratio of 1.3-1.6; and   the one-stage relaxation is performed at a temperature of 97-105° C. to a total relaxation ratio of 2.5-3.0%.   
     
     
         35 . The method of  claim 21 , wherein in S4:
 the high-viscosity anti-ultraviolet modified polyester chip obtained in S2 is conveyed to a screw extruder;   the antibacterial master batch obtained in S3 is added into the screw extruder through an online addition process, and melt-mixed together with the high-viscosity anti-ultraviolet modified polyester chip, and extruded to form a spinning melt; and   the spinning melt is metered by means of a metering pump, filtered using a filtering system, then sprayed out through a spinneret, and cooled by side blowing, to form the tow.   
     
     
         36 . The method of  claim 35 , wherein:
 the high-viscosity anti-ultraviolet modified polyester chip has an intrinsic viscosity of 1.050-1.070 dl/g;   temperatures of zones of the screw extruder are 292-302° C., 296-302° C., 293-300° C., 290-295° C., 287-293° C., and 287-293° C.;   the metering pump is operated at a rotational speed of 16-18 r/min; and   a temperature of a slow cooling zone is in a range of 315-325° C.   
     
     
         37 . The method of  claim 35 , wherein the spinneret is a different-filament spinneret. 
     
     
         38 . The method of  claim 21 , wherein in S6:
 the first oiling is performed by an oil pulley;   an oiling agent for the first oiling is GXM-100 spinning oiling agent;   a first oiling agent pump has a rotating speed of 28-32 r/min;   a second oiling agent pump has a rotating speed of 20-24 r/min; and   an oil picking up is in a range of 0.5-0.8%.   
     
     
         39 . The method of  claim 21 , wherein in S7:
 an oiling agent for the second oiling is a Gaussian oiling agent;   an interlacing pressure is in a range of 0.35-0.45 MPa;   a total oil picking up is in a range of 1.0-1.3%; and   the winding forming is performed by a twin-roller winding machine at a winding speed of 2600-2800 m/min and a winding tension of 600-800 cN.   
     
     
         40 . A polyester industrial yarn dedicated to a marine hawser, prepared by the method of  claim 21 .